Genetics Final Summer 2008 pg 4

Genetics Final Summer 2008 pg 4 - chromosome 17 and blocks...

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18. You are studying migration between two different populations of dragonfly. You have chosen to use a gene that differs in allele frequencies between the two populations and you know that the gene is not currently under selection and the population sizes are large, so genetic drift is not a significant issue. You measure the allele frequencies of the two populations in the adults in year one (generation 1). In year two (generation 2) you measure the allele frequencies of the newly emerged offspring in each of the two populations. The data is shown below. What is the migration rate (m) from population 2 to population 1? Population 1 Population 2 Generation 1: fA = 0.48; fa = 0.52 fA = 0.19; fa = 0.81 Generation 2: fA = 0.42; fa = 0.58 fA = 0.23; fa = 0.77 a. 0.105 b. 0.138 c. 0.164 d. 0.179 e. 0.207 19. In humans, a protein encoded by gene A on chromosome 17 binds to a region upstream from gene B on
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Unformatted text preview: chromosome 17 and blocks the transcription of gene B. Which of the following describes how gene A acts on gene B? a. trans b. cis c. positive control d. both a and c e. both b and c 20. Which of the following is a post-transcriptional regulatory process? a. differential splicing b. protein turnover c. cis dominance d. both a and b e. both b and c 21. Which of the following techniques can be used to isolate large amounts of a specific region of a DNA molecule? a. cloning b. sequencing c. PCR d. Northern blot e. Both a and c 22. Which of the following describe the action of genetic drift in a large population? a. causes wide fluctuations in allele frequencies each generation b. the time to fixation of a neutral allele will take a longer time in a large population c. causes small fluctuations in allele frequencies each generation d. both a and b e. both b and c...
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